Two-part hair dye composition

ABSTRACT

A two-part hair dye composition, including a first part containing an alkali agent, a second part containing hydrogen peroxide, and a non-aerosol type foamer container for discharging a liquid mixture of the first part and the second part as a foam, wherein the liquid mixture contains the following components (A) to (D):
         (A) 0.1 to 5% by mass of an alkyl sulfate or a polyoxyalkylene alkyl sulfate;   (B) 0.1 to 10% by mass of an alkyl polyglucoside;   (C) 0.01 to 3% by mass of a dimethyldiallyl ammonium chloride-acrylamide copolymer or a dimethyldiallyl ammonium chloride-acrylamide-acrylic acid copolymer; and   (D) 0.01 to 0.8% by mass of a higher alcohol.

FIELD OF THE INVENTION

The present invention relates to a two-part hair dye composition.

BACKGROUND OF THE INVENTION

Conventionally, hair dye compositions in a liquid or cream form havebeen in widespread use, but it is difficult to evenly apply thosecompositions to the head hair. In particular, consumers must acquireskills, such as blocking or two mirror technique, to apply thecompositions evenly to the root portions of the head hair or to the headhair of an occipital region of the head by themselves, and must carryout operations carefully to apply the compositions evenly.

In view of the foregoing, it has been proposed to simplify hair dyeingoperations by discharging an agent as a foam, and for example, atwo-part aerosol type and a one-part non-aerosol type have been known.However, the two-part aerosol type composition involves problems in thatuneven bleaching and uneven dyeing are likely to occur because themixing ratio of a first part and a second part does not become constant,a pressure-resistant container and the like made of a metal are oxidizedand corroded by hydrogen peroxide, and the internal pressure in thepressure-resistant container is excessively increased owing to thedecomposition of hydrogen peroxide. Further, one part non-aerosol typecomposition involves a problem in that the one part non-aerosol typecomposition shows no or little bleaching ability enough to causesubstantial color tone change in a single application, thereby leavingthe composition for a long period of time after the application, orrepetitive application of the composition is necessary, resulting in thehair dyeing operations being complicated.

In contrast to the above, products characterized in that a two-part hairdye composition is discharged as a foam from a non-aerosol type foamercontainer have been proposed (see Patent Documents 1 and 2). In thoseproducts, through the discharge of a liquid mixture of a first part anda second part as a foam from a foamer container, the variations ofmixing ratio hardly occur compared to the conventional two-partnon-aerosol type products, and sufficient bleaching ability or hairdyeing ability may be provided compared to the conventional one partnon-aerosol type products.

However, in order to foam a liquid mixture with a non-aerosol typefoamer container, the liquid mixture must have a low viscosity, and atthe same time, the liquid mixture must be prevented from dripping whenbeing applied to the hair.

Patent Documents 1 and 2 disclose a method of incorporating a higheralcohol to prevent a liquid mixture from dripping. However, in the caseof a higher alcohol being used, the problem is that, viscosity of theliquid mixture increases when the liquid temperature is low, forexample, in winter season, thereby foaming the liquid mixture with afoamer container being difficult.

[Patent Document 1] JP-A-2004-339216

[Patent Document 2] JP-A-2006-124279

SUMMARY OF THE INVENTION

The present invention provides a two-part hair dye composition,including a first part containing an alkali agent, a second partcontaining hydrogen peroxide, and a non-aerosol type foamer containerfor discharging a liquid mixture of the first part and the second partas a foam, in which the liquid mixture includes the following components(A) to (D):

(A) 0.1 to 5 mass % of an alkyl sulfate or a polyoxyalkylene alkylsulfate;

(B) 0.1 to 10 mass % of an alkyl polyglucoside;

(C) 0.01 to 3 mass % of a dimethyldiallyl ammonium chloride-acrylamidecopolymer or a dimethyldiallyl ammonium chloride-acrylamide-acrylic acidcopolymer; and

(D) 0.01 to 0.8 mass % of a higher alcohol.

Further, the present invention provides a head hair dyeing method,including: discharging the liquid mixture of the two-part hair dyecomposition described above as a foam from a non-aerosol type foamercontainer; applying the foam to a head hair, and then re-foaming on thehead hair.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a drawing illustrating a two-part hair dye composition beforemixing used in Examples and Comparative Examples.

FIG. 2 is a drawing illustrating a two-part hair dye composition aftermixing used in Examples and Comparative Examples.

DESCRIPTION OF SYMBOLS

1 respective components of two-part hair dye composition

2 first container

3 second container

4 container body for squeeze container

5 squeeze foamer

6 squeeze container

A1 first part

A2 second part

A3 liquid mixture

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to a two-part hair dye composition as afoam, which exhibits satisfactory foaming property even at lowtemperature, and which causes no liquid dripping during a period fromthe application of a liquid mixture to the hair to the rinsing awaythereof.

The inventors of the present invention have found that theabove-mentioned object can be achieved by incorporating a specificanionic surfactant, a specific nonionic surfactant, a specific polymer,and a higher alcohol at a given proportion into a liquid mixture of afirst part and a second part in the two-part non-aerosol type hair dyecomposition.

According to the present invention, the liquid mixture of the two-parthair dye composition is discharged as a foam, and can be applied evenlyand simply to the head hair. Further, the foam of the discharged liquidmixture is in a fine state even when the liquid temperature is low in,for example, the winter season, exhibits a good affinity to the headhair, and causes no liquid dripping after the application to the headhair. In addition, the foam does not cause irritation to the scalp andspattering of the composition, and has sufficient bleaching ability ordyeing ability. Therefore, the hair dye composition of the presentinvention can provide a uniform and more even bleaching finish or hairdyeing finish in a simple and comfort manner.

Further, the liquid mixture discharged as a foam by gas-liquid mixingusing a non-aerosol type foamer container easily reaches the roots ofthe head hair, and the liquid mixture spreads throughout the head hairin an appropriate thin layer without liquid accumulation or the like atthe site. Thus, unlike a case of using conventional compositions such asa liquid or cream form, the root portions do not become extremelybright, and uneven bleaching and uneven dyeing due to the unevenadhesion amount of the liquid mixture do not occur. Accordingly, throughapplication of the two-part hair dye composition of the presentinvention to the head hair in the vicinity of newly growing areas suchas the parting and face line, any difference in color between newlygrowing areas and already dyed areas may also be avoided to provide anatural finish. Further, because the liquid mixture may be applied tothe head hair in an appropriate amount, damages to the head hair may bereduced.

[Definition]

The head hair as used herein refers to hair that grows on the head, andis a concept that excludes hair such as a hairpiece and a tress, whichare separated from the head. Further, any head hair derived from a dolland all animals may be used. However, human head hair is preferred.

The two-part hair dye composition as used herein is a concept thatincludes both of a hair dye composition containing a dye and a bleachcomposition containing no dye. The head hair dyeing method is a conceptthat includes a head hair bleaching method.

[Alkali Agent]

For an alkali agent contained in the first part, ammonia, analkanolamine such as ethanolamine, sodium hydroxide, and potassiumhydroxide may be used, for example. Further, optionally, an ammoniumsalt such as ammonium hydrogen carbonate and ammonium chloride, acarbonate such as potassium carbonate and sodium hydrogen carbonate, andthe like may be added as a buffer.

The pH of the liquid mixture of the first part and the second part inthe two-part hair dye composition of the present invention is preferably8 to 11, and more preferably 9 to 11, and the use amount of the alkaliagent is appropriately adjusted so that the pH of the liquid mixturefalls within the above-mentioned range.

[Hydrogen Peroxide]

The content of hydrogen peroxide in the second part is preferably 1 to9% by mass, and more preferably 3 to 6% by mass, and the content ofhydrogen peroxide in the liquid mixture of the first part and the secondpart is preferably 1 to 6% by mass, and more preferably 2 to 5% by mass.Further, the pH of the second part is adjusted to preferably 2 to 6, andmore preferably 2.5 to 4 in order to prevent the decomposition of thehydrogen peroxide.

[(A) and (B): Surfactant]

In order that a foam be easily formed by mixing air and the hair dyecomposition with means for discharging a foam in a foamer container, andthe foam be stabilized, a surfactant is incorporated into any one of orboth of the first part and the second part. In the present invention,for the surfactant, an alkyl sulfate or a polyoxyalkylene alkyl sulfateas a component (A) and an alkyl polyglucoside as a component (B) areused in combination in order to provide satisfactory foaming propertywhich allows easy application to the head hair even when the liquidtemperature is low or is close to normal temperature.

The alkyl sulfate or the polyoxyalkylene alkyl sulfate as the component(A) preferably includes an alkyl group having 10 to 24 carbon atoms, andmore preferably 12 to 18 carbon atoms, and further, the alkyl group ispreferably linear. In addition, preferred is a polyoxyalkylene alkylsulfate, and more preferred is a polyoxyethylene alkyl sulfate. Ofthose, polyoxyethylene alkyl sulfate including an oxyethylene group withan average addition mole number of 1 to 10, and more preferably 2 to 5is preferred.

The component (A) may be used in a combination of two or more kindsthereof, and the content thereof in the liquid mixture of the first partand the second part is 0.1 to 5% by mass, preferably 0.1 to 1% by mass,and more preferably 0.2 to 0.6% by mass.

The alkyl polyglucoside as the component (B) preferably includes analkyl group having 8 to 18 carbon atoms, more preferably 8 to 14 carbonatoms, and even more preferably 9 to 11 carbon atoms, and further, thealkyl group is preferably linear. The average polymerization degree ofglucoside is preferably 1 to 5, and more preferably 1 to 2.

The component (B) may be used in a combination of two or more kindsthereof, and the content thereof in the liquid mixture of the first partand the second part is 0.1 to 10% by mass, preferably 1 to 5% by mass,and more preferably 2 to 4% by mass.

In order to improve a foam quality at low liquid temperature, the massratio of the component (A) to the component (B) (content of component(A)/content of component (B)) in the liquid mixture is preferably 0.05to 0.8, more preferably 0.07 to 0.6, even more preferably 0.08 to 0.5,and even more preferably 0.1 to 0.3.

When the two-part hair dye composition of the present invention is ahair dye, the first part contains an oxidation dye or a direct dye. Fora surfactant to be incorporated into the first part in order to dissolvethose dyes, it is preferred to mainly use the alkyl polyglucoside as thecomponent (B) which is a nonionic surfactant in view of the high ionicstrength of the first part due to ammonia and a carbonate which arecontained in the first part.

Meanwhile, the alkyl sulfate or the polyoxyalkylene alkyl sulfate as thecomponent (A) which is an anionic surfactant is preferably incorporatedinto the second part in view of the high ionic strength of the firstpart.

[(C) Dimethyldiallyl ammonium chloride-acrylamide copolymer ordimethyldiallyl ammonium chloride-acrylamide-acrylic acid copolymer]

In a component (C), a dimethyldiallyl ammonium chloride-acrylamidecopolymer is Polyquaternium-7 (INCI name), and as commercially availableproducts, there are given such as Merquat 550 (Nalco Company), forexample. Further, a dimethyldiallyl ammonium chloride-acrylamide-acrylicacid copolymer is Polyquaternium-39 (INCI name), and as commerciallyavailable products, there are given such as Merquat Plus 3330 andMerquat Plus 3331 (which are manufactured by Nalco Company), forexample.

The component (C) may be used in a combination of two or more kindsthereof, and is preferably not incorporated into the second partcontaining an anionic surfactant, but incorporated into the first partin terms of storage stability.

The content of the component (C) in the liquid mixture of the first partand the second part is 0.01 to 3% by mass, preferably 0.1 to 1% by mass,and more preferably 0.2 to 0.5% by mass in order to provide satisfactoryfoaming property which allows easy application to the head hair evenwhen the liquid temperature is low or is close to normal temperature,and to provide an effect of preventing liquid dripping during a periodfrom the application of the liquid mixture to the hair to the rinsingaway thereof.

Further, in order to improve a foam quality at low liquid temperatureand prevent liquid dripping, the mass ratio of the component (A) to thecomponent (C) (content of component (A) /content of component (C)) inthe liquid mixture is preferably 0.1 to 10, more preferably 0.3 to 7,even more preferably 0.5 to 5, and even more preferably 1 to 3.

[(D): Higher Alcohol]

A higher alcohol as the component (D) is used in order to improvefoam-holding property and to enhance an effect of suppressing liquiddripping during being left to stand after the application of thetwo-part hair dye composition of the present invention to the head hair.The higher alcohol preferably includes an alkyl group or an alkenylgroup having 10 to 30 carbon atoms, more preferably 12 to 24 carbonatoms, and even more preferably 14 to 22 carbon atoms. Of those, ahigher alcohol having an alkyl group, and more preferably a linear alkylgroup is preferred. Examples of the higher alcohol as the component (D)include myristyl alcohol, cetyl alcohol, stearyl alcohol, behenylalcohol, isostearyl alcohol, and oleyl alcohol. Those may be used in acombination of two or more kinds thereof.

The component (D) may also be used in a combination of two or more kindsthereof, and may be incorporated into any one of or both of the firstpart and the second part. The content of the component (D) in the liquidmixture of the first part and the second part is preferably 0.01 to 0.8%by mass, more preferably 0.1 to 0.7% by mass, and even more preferably0.2 to 0.6% by mass from the viewpoints that the foamability is notinhibited at low liquid temperature, and an effect of suppressing liquiddripping during being left to stand is enhanced.

[(E): Dimethyldiallyl ammonium chloride-acrylic acid copolymer]

In order to control antifoaming property after the application to thehair, maintain appropriate foam duration, and facilitate theconfirmation of an applied portion, as a component (E), adimethyldiallyl ammonium chloride-acrylic acid copolymer (INCI name:Polyquaternium-22), together with the component (C), may be used incombination in the two-part hair dye composition of the presentinvention. For example, commercially available products such as Merquat280 and Merquat 295 (which are manufactured by Nalco Company) may beused as the component (E).

Similar to the component (C), the component (E) is also preferably notincorporated into the second part containing an anionic surfactant, butincorporated into the first part in terms of storage stability. Thecontent of the component (E) in the liquid mixture of the first part andthe second part is preferably 0.01 to 0.5% by mass, and more preferably0.1 to 0.2% by mass in order to provide the above-mentioned effectwithout inhibiting foaming property at low liquid temperature.

[(F): Nonvolatile Hydrophilic Solvent]

In addition, it is preferred that a nonvolatile hydrophilic solvent becontained in the first part or the second part. This may reduce theirritation to the scalp due to enrichment of an irritating componentsuch as hydrogen peroxide through water evaporation from the two-parthair dye composition of the present invention during being left to standafter the application of the hair dye composition to the head hair. Thenonvolatile hydrophilic solvent that does not have any antifoamingaction, such as polyols and lower (1 to 4 carbon atoms) alkyl ethersthereof, is preferable. Preferred are polyols having 2 to 6 carbonatoms, and examples thereof include glycerin, diglycerin, propyleneglycol, dipropylene glycol, 1,3-butanediol, ethylene glycol, diethyleneglycol, isoprene glycol, and sorbitol. Examples of the lower alkylethers of polyols include mono-lower alkyl ethers and poly-lower alkylethers (for example, di-lower alkyl ethers) of the above-mentionedpolyols. Of those, preferred are monomethyl ethers or monoethyl ethersof polyols, and specific examples thereof include ethylene glycolmonomethyl ether, ethylene glycol monoethyl ether, diethylene glycolmonomethyl ether, and diethylene glycol monoethyl ether. Two or morekinds of those ethers may be used in combination.

The content of the nonvolatile hydrophilic solvent in the liquid mixtureof the first part and the second part is preferably 0.01 to 4% by mass,more preferably 0.1 to 3% by mass, and even more preferably 0.2 to 2% bymass in terms of providing an effect of reducing the irritation to thescalp and a satisfactory foam quality even at low liquid temperature.

[Dye]

The two-part type hair dye composition of the present invention may beused for bleaching the head hair when a dye is not incorporated in theliquid mixture of the first part and the second part, and thecomposition may be used for hair dyeing by incorporating an oxidationdye or a direct dye into the liquid mixture. When the composition isused for hair dyeing, the first part contains an oxidation dye or adirect dye. Examples of the oxidation dye include: dye precursors suchas p-phenylenediamine, toluene-2,5-diamine, o-chloro-p-phenylenediamine,N-phenyl-p-phenylenediamine, N,N-bis(hydroxyethyl)-p-phenylenediamine,3-methyl-4-aminophenol, 2-hydroxyethyl-p-phenylenediamine,p-aminophenol, p-methylaminophenol, 4-amino-m-cresol, o-aminophenol,1-hydroxyethyl-4,5-diaminopyrazole, or salts thereof; and couplers suchas resorcin, 2-methylresorcin, 1-naphthol, 1,5-dihydroxynaphthalene,5-amino-o-cresol, m-phenylenediamine, m-aminophenol,2,4-diaminophenoxyethanol, 2,6-diaminopyridine,2-methyl-5-hydroxyethylaminophenol, 2-amino-3-hydroxypyridine, or saltsthereof.

Examples of the direct dye include a basic dye, a nitro dye, adispersion dye, and a cationic dye. Further, specific examples thereofinclude 2-nitro-p-phenylenediamine, 2-amino-6-chloro-4-nitrophenol,3-nitro-p-hydroxyethylaminophenol, 4-nitro-o-phenylenediamine,4-amino-3-nitrophenol, 4-hydroxypropylamino-3-nitrophenol, HC Blue 2, HCOrange 1, HC Red 1, HC Yellow 2, HC Yellow 4, HC Yellow 5, HC Red 3,N,N-bis(2-hydroxyethyl)-2-nitro-p-phenylenediamine, Disperse Violet 1,Disperse Blue 1, Disperse Black 9, Basic Blue 99, Basic Brown 16, BasicBrown 17, Basic Red 76, Basic Yellow 76, Basic Orange 31, and Basic Red51.

[Silicones]

In the two-part type hair dye composition of the present invention, thecontent of silicone in the liquid mixture of the first part and thesecond part is preferably 0.5% by mass or less, and more preferably freeof silicones in view of enabling a discharged foam to be maintained fora long period of time. However, silicones may be further incorporatedwithin a predetermined range for the foam to fit comfortably to the headhair, and to impart a high conditioning effect to the head hair.Examples of the silicones include dimethylpolysiloxane,methylphenylpolysiloxane, a polyether-modified silicone, anamino-modified silicone, and an oxazoline-modified silicone elastomer,and emulsions obtained by dispersing those silicones in water using asurfactant. Of those, preferred are a polyether-modified silicone, anamino-modified silicone, and an emulsion thereof, because thosesilicones may be stably dispersed in water without the use of athickener.

When silicone is used for the above-mentioned purposes, the content ofsilicones in the liquid mixture of the first part and the second part ispreferably 0.01 to 0.5% by mass, more preferably 0.02 to 0.4% by mass,and even more preferably 0.05 to 0.3% by mass.

[Other Components]

In addition to the above, the first part and the second part maycontain, depending on its purposes, a fragrance, an ultravioletabsorber, a sequestering agent such as EDTA, a microbicide, apreservative such as methyl p-hydroxybenzoate, a stabilizer such asphenacetin, etidronic acid, and oxyquinoline sulfate, an organic solventsuch as ethanol, benzyl alcohol, and benzyloxyethanol, a water-solublepolymeric compound such as polyquaternium-6, polyquaternium-39, andhydroxyethylcellulose, and a humectant, for example. Further, it ispreferred that the liquid mixture of the first part and the second partmainly contain water as a medium.

It should be noted that a persulfate such as ammoniumpersulfate may beincorporated as a third part into the liquid mixture in order to furtherenhance a bleaching effect.

[Viscosity]

The viscosity (25° C.) of the first part is preferably 1 to 50 mPa·s,more preferably 3 to 40 mPa·s, and even more preferably 5 to 30 mPa·s.The viscosity (25° C.) of the second part is preferably 1 to 300 mPa·s,more preferably 3 to 200 mPa·s, and even more preferably 5 to 100 mPa·s.The viscosity (25° C.) of the liquid mixture of the first part and thesecond part is 1 to 100 mPa·s, preferably 3 to 50 mPa·s, and even morepreferably 5 to 30 mPa·s. It should be noted that the value of theviscosity is a value obtained after rotation of a rotor for 1 minuteusing a No. 1 rotor in a Brookfield rotational viscometer (Model TV-10)manufactured by Tokimec Inc. When a measurement target has a viscosityof 100 mPa·s or less, 100 to 200 mPa·s, and 200 to 500 mPa·s,measurement is performed at a rotation speed of 60 rpm, 30 rpm, and 12rpm, respectively. The adjustment of the viscosity of the liquid mixtureto the above-mentioned range allows homogeneously mixing the liquidmixture without foaming the liquid mixture, and further, may provideuniform foam which is easily applied to the head hair, exhibits a goodaffinity to the head hair, and hardly causes liquid dripping after theapplication to the head hair.

The adjustment of the viscosity to the above-mentioned range allows aquality of foam that is easily applied and exhibits good affinity to thehead hair to be provided, allows the dripping after the application ofthe foam to the head hair to be suppressed, and enables the foam to beeasily discharged in discharging the foam with a non-aerosol typefoamer. In order to adjust the viscosity to the above-mentioned range,it is recommended that a water-soluble solvent such as ethanol be added,or the content and kind of a surfactant, polyols, a higher alcohol, andthe like be appropriately adjusted.

[Gas-Liquid Mixing Ratio]

The gas-liquid mixing ratio of air to the liquid mixture in the foamdischarged with a foamer container is preferably 10 to 50 mL/g, morepreferably 15 to 40 mL/g, and even preferably 20 to 30 mL/g in terms ofachieving good affinity and easiness of application of the agent to thehair. It should be noted that the gas-liquid mixing ratio used in thisembodiment is a value measured as described below.

The gas-liquid mixing ratio is determined by measuring the mass and thevolume of the foam discharged at 25° C. 100 g of a liquid mixture arecharged into a foamer container, 20 g of foam are discharged into a1000-mL measuring cylinder, and the volume of the foam is measured 1minute after the start of discharge. The gas-liquid mixing ratio (mL/g)can be obtained by dividing the volume (mL) of the discharged foam bythe mass of 20 g.

[Foamer Container]

In the present invention, the foamer container is a non-aerosol typecontainer, and is used for mixing a first part and a second part or aliquid mixture thereof with air without using a propellant anddischarging the mixture as a foam. The use of the foamer container alsoprovides an effect of preventing the discharged agent from spattering.In particular, in a comparison with an aerosol type container, thenon-aerosol type container may be produced at a low production cost, iseasily adjusted for the discharge speed, may be recycled by performing agiven treatment, and may be handled more safely in a productdistribution because the container does not need a high pressure gaspropellant.

For the foamer container, any container may also be used as long asbeing a non-aerosol type container, and having means for dischargingfoam, such as a known pump foamer container and squeeze foamer containerhaving foam discharging means.

The pump foamer container or the squeeze foamer container has a foamproducing portion such as a net, and preferably has a thin net from theviewpoint that, when clogging occurs owing to drying and solidificationof the liquid mixture of the first part and the second part, theclogging may be eliminated by instantaneously dissolving the solidifiedproduct by a foam flow at the time of the next discharge. In this case,the mesh of the net is preferably 50 to 280 mesh, more preferably 90 to250 mesh, and even more preferably 130 to 220 mesh. Creamy foam may beproduced by using a net having a mesh in the above-mentioned range.Further, a material for such mesh is preferably nylon, polyethylene,polypropylene, polyester, Teflon (registered trademark), a carbon fiber,and stainless, more preferably nylon, polyethylene, polypropylene, andpolyester, and even more preferably nylon, for example.

The foamer container to be used in the two-part hair dye composition ofthe present invention is provided with such net by at least one net, andpreferably multiple nets. From the viewpoints of economic efficiency,foam stability, and the like, two nets are more preferred. In this case,it is preferred that the openings of the mesh through which a liquidfirstly passes be more rough than or equal to that of the mesh throughwhich the liquid secondly passes.

The Portion (for example, inner wall of container and inner wall ofmeans for discharging foam), which comes into contact with contents inthe foamer container, is preferably composed of a material that is notcorroded with an alkali and hydrogen peroxide, and is able to passoxygen resulting from the decomposition of hydrogen peroxide.

With regard to the product form of the two-part hair dye composition ofthe present invention including the first part, the second part, and thefoamer container, the first part and the second part are each chargedinto a container separated from the foamer container, and both parts maybe transferred into the foamer container and mixed with each otherbefore use. Alternatively, one part is charged into the foamercontainer, the other part is charged into a separate container, and theother part may be transferred into the foamer container before use. Inthis case, in order to prevent the pressure in the container from beingelevated by oxygen resulting from the decomposition of hydrogenperoxide, the second part is charged into preferably a foamer containermade of a gas permeable container, and more preferably a foamercontainer made of an oxygen permeable material (such as polypropyleneand polyethylene). Meanwhile, in order to prevent an oxidation dye frombeing oxidized, a container that hardly passes oxygen is preferable tobe used for the first part.

[Head Hair Dyeing Method]

In order to dye the head hair with the two-part hair dye composition ofthe present invention, it is preferred to discharge the liquid mixtureof the first part and the second part as a foam from a non-aerosol typefoamer container, to apply the foam to the head hair, then to re-foamthe liquid mixture applied foam on the head hair, and to wash the foamaway after a lapse of about 3 to 60 minutes, and preferably about 5 to45 minutes from the application.

In the two-part hair dye composition, the first part and the second partare mixed with each other immediately before use to perform a hairdyeing treatment. In the present invention, the first part and thesecond part may be mixed in accordance with any one of the following:

1) mixing is performed before being charged into the body of the foamercontainer;

2) mixing is performed in the body of the foamer container;

3) the first part and the second part are mixed with each other byjoining in a gas-liquid mixing chamber in the foamer;

4) the first part and the second part are separately foamed once, andthen both foamed agents are merged to be mixed with each other beforebeing discharged from the foamer;

5) the foam of the first part and the foam of the second part, whichhave been separately discharged, are mixed with each other before beingapplied to the head hair; and

6) the foam of the first part and the foam of the second part, whichhave been separately discharged, are mixed with each other on the headhair.

Of those, from the viewpoints of allowing simplifying the structure ofthe foamer container, freely designing the compositions of the firstpart and the second part, and mixing in a reliable and uniform manner,it is preferred that 1) mixing is performed before being charged intothe body of the foamer container, or 2) mixing is performed in the bodyof the foamer container.

It is preferred to comb the head hair in advance before the dischargedfoam is applied. This prevents the hair from being highly entangledduring the re-foaming treatment, and hence, there is no fear ofspattering the hair dye composition. Further, after the head hair hasbeen combed, it is not necessary to perform a blocking operation whichhas been commonly used in the application of the hair dye composition,and further, it is preferred that the blocking operation be notperformed. This facilitates an operation of applying the hair dyecomposition to the head hair and an operation of re-foaming as describedlater.

To the head hair to which the hair dye composition is applied, it ispreferred to apply no hair dressing immediately before a hair dyeingtreatment from the viewpoints of achieving even hair dyeing, preventingliquid dripping, and providing a sufficient hair dyeing effect. Further,the head hair is preferably being dried from the viewpoints of causingno dilution in the liquid mixture, achieving even hair dyeing,preventing liquid dripping, and providing a sufficient hair dyeingeffect. In the case of rinsing the hair immediately before a hair dyeingtreatment, the head hair is preferably dried before the hair dyeingtreatment. The phrase “head hair is dried” refers that a liquid mainlycontaining water deposited by rinsing the hair is removed at least tosuch an extent that the liquid does not drip in a natural state.Specifically, it is preferred to dry the hair with a towel or a dryer.

The liquid mixture of the first part and the second part discharged as afoam is applied to the head hair after having been taken in hand or abrush, or directly. Here, in the case of performing the application byhand, it is preferred to protect the hand with a glove. According to thedyeing method of the present invention, because it is not necessary toperform a blocking operation which has been generally used in theapplication of the hair dye composition, the foam may be applied in ashort period of time. Thus, the head hair site to which foam is appliedfirst may be any portion, and it is not necessary to apply the foamfirst to the border of the back hair, unlike a conventional two-parthair dye composition in a liquid or cream form. It is preferable toapply the foam first to a portion of concern, and it is preferable toapply the foam first to the hairline or parting portion of the headhair.

It is preferred to discharge foam in an amount close to the size of alemon because the amount is suitable for taking the foam in one hand andis easily applied by hand to the head hair. In this case, an operationof discharging foam is performed by one hand, and the foam is taken inthe other hand. Then, operations of applying the foam taken in hand onceto the head hair, and then discharging foam in hand again to apply thefoam to the head hair are repeated. This series of operations may beperformed in a very simple manner and for a short period of time.

Further, the range in which foam is applied may be the whole head hairor may be only a specific portion.

Next, the applied foam is subjected to re-foaming on the head hair. There-foaming may be performed by injecting gas, using an instrument suchas a shaker and a brush, or using fingers, and it is more preferred touse fingers because the two-part hair dye composition may spreadsufficiently to the roots of the head hair as well. The speed of foamingby using a shaker, a brush, or fingers is preferably controlled so as toprevent the foam from being spattered.

Here, re-foaming may be performed after the foam has disappearedcompletely, in the middle of foam disappearance, or before the appliedfoam is changed. Alternatively, re-foaming may be performed after thecompletion of the application to all the ranges in each of which foam isto be applied, or in the middle of the application. Re-foaming may beperformed once continuously or may be performed multiple timesintermittently. Here, if a shaker and a brush or fingers used forre-foaming are in contact with a part of the head hair continuously, orif they are departed away from a part of the head hair temporarily butcome in contact with the part again within 1 second, the re-foaming iscontinuous. In short, a site to which foam is applied is observed, andfoaming may be appropriately performed at least before a liquid dripsfrom the applied foam. Liquid dripping may be prevented irrespective ofthe properties of foam by foaming disappearing foam again. In addition,even if foam has different properties based on the structure of thefoamer container and the composition of the two-part hair dyecomposition, it is possible to change a foam quality to suitable one forhair dyeing by re-foaming. The foamer container having a specificstructure and the two-part hair dye composition having a specificcomposition may prevent liquid dripping to provide the maintenance of afoam quality suitable for hair dyeing without re-foaming. However, evenin such case, it is preferred that re-foaming be performed at least onceby the timing as early as possible after the completion of theapplication of foam. Re-foaming may performed at the earlier timing toprevent color unevenness in the range to which foam should be applied.The timing is preferably within 5 minutes, more preferably within 3minutes, and even more preferably within 1 minute after the completionof the application of the discharged foam to the head hair.

Hereinafter, a specific example of a preferred procedure in the steps offrom discharging foam, applying the foam to the head hair, andre-foaming is exemplified with regard to partial hair dyeing and wholehair dyeing.

[Partial Hair Dyeing]

1) An appropriate amount of foam is discharged in one hand, the foam isapplied to a part of the head hair, and one time of re-foaming isperformed for 1 second to 10 minutes, and preferably 3 seconds to 3minutes.

2) An appropriate amount of foam is discharged in one hand, the foam isapplied to a part of the head hair, and 2 to 30 times of re-foaming areperformed for 1 second to 10 minutes, and preferably 3 seconds to 3minutes per one time. The re-foaming is performed for 2 seconds to 20minutes, and preferably 5 seconds to 5 minutes in total.

[Whole Hair Dyeing]

3) An appropriate amount of foam is discharged in one hand, the foam isapplied to a part of the head hair, and one time of re-foaming isperformed for 3 seconds to 10 minutes, and preferably 5 seconds to 3minutes. The foam is applied to the whole hair by repeating theoperation.

4) An appropriate amount of foam is discharged in one hand, the foam isapplied to a part of the head hair, and one time of re-foaming isperformed for 3 seconds to 10 minutes, and preferably 5 seconds to 3minutes. After the foam had been applied to the whole hair by repeatingthe operation, one time of re-foaming is performed for 3 seconds to 10minutes, and preferably 5 seconds to 3 minutes. In addition, anappropriate amount of foam is discharged in one hand, the foam isadditionally applied to a part of the head hair, and one time ofre-foaming is performed over the whole hair for 3 seconds to 10 minutes,and preferably 5 seconds to 3 minutes.

5) An appropriate amount of foam is discharged in one hand, the foam isapplied to a part of the head hair, and one time of re-foaming isperformed for 3 seconds to 10 minutes, and preferably 5 seconds to 3minutes. The foam is applied to the whole hair by repeating theoperation. After the completion of the application to the whole hair,one time of re-foaming is performed for 3 seconds to 10 minutes, andpreferably 5 seconds to 5 minutes.

6) An appropriate amount of foam is discharged in one hand, the foam isapplied to a part of the head hair, and one time of re-foaming isperformed for 3 seconds to 10 minutes, and preferably 5 seconds to 3minutes. The foam is applied to the whole hair by repeating theoperation. After the completion of the application to the whole hair, 2to 30 times of re-foaming are performed over the whole hair for 3seconds to 10 minutes, and preferably 5 seconds to 3 minutes per onetime. The re-foaming is performed for 6 seconds to 20 minutes, andpreferably 10 seconds to 5 minutes in total.

7) An appropriate amount of foam is discharged to a brush, and the foamis applied to a part of the head hair. The foam is applied to the wholehair by repeating the operation, and re-foaming is performed over thewhole hair by using the same brush for 3 seconds to 10 minutes, andpreferably 5 seconds to 5 minutes.

8) An appropriate amount of foam is discharged to a brush, the foam isapplied to a part of the head hair, and one time of re-foaming isperformed by using the same brush or hand for 3 seconds to 10 minutes,and preferably 5 seconds to 3 minutes. The foam is applied to the wholehair by repeating the operation. After the completion of the applicationto the whole hair, one time of re-foaming is performed by using the samebrush or hand for 3 seconds to 10 minutes, and preferably 5 seconds to 5minutes.

The range in which re-foaming is performed may be the whole head hair ormay be only a specific portion. Even if application of foam is missed ata portion that is hardly confirmed such as hair in an occipital regionof the head, the foam may be spread throughout by subjecting the wholehead hair to re-foaming, which may prevent undyed hair from remaining.When only a specific portion is subjected to re-foaming in partial hairdyeing, the dyed border may be shaded off, leading to a natural finish.Further, when the re-foaming is performed, a portion throughout whichthe foam has spread can be visually confirmed very easily, which mayprevent an undyed portion that should be dyed from remaining.

The foam is washed away after a lapse of time for about 3 to 60 minutes,and preferably about 5 to 45 minutes after the completion of theapplication of the foam. In the present invention, the time after thecompletion of the application of foam refers to the total time requiredfrom completely applying foam to the whole hair or a desired portion torinsing the foam away, and is a concept that includes not only a timefor simply allowing left to stand, but also a time required forre-foaming. After that, the hair is properly shampooed and rinsed, andthen washed with water and dried.

Examples Examples 1 to 10 and Comparative Examples 1 to 4

A first part and a second part having blend compositions (% by mass) asshown in Tables 1 to 3 were prepared. As illustrated in FIG. 1, 40 g ofa first part (A1) was charged into a first container (2), and 60 g of asecond part (A2) was charged into a second container (3) (also servingas container body (4) of squeeze container; internal volume: 210 mL),respectively. Further, a squeeze foamer (5) (S1 squeeze foamermanufactured by Daiwa Can Company) was prepared.

The charged first part and second part, and the squeeze foamer weregiven to specialized panelists (Japanese women aged in their 20's withshoulder-length black hair) and hair dyeing was performed in accordancewith the following procedure.

“Hair Dyeing Procedure”

1. 40 g of a first part are charged into a container body (4) of asqueeze container charged with 60 g of a second part, the first part andthe second part are mixed with each other so as not to foam a liquidmixture, and then a squeeze foamer (5) is attached to the container body(FIG. 2).

2. After wearing of a glove, a squeeze container is squeezed by one handunder a state in which the squeeze container is upright, and a foamedliquid mixture is discharged in the palm of the other hand.

3. The foamed liquid mixture is applied to the dried head hair.

4. By repeating the operations according to the items 1 and 2, 80 g ofthe liquid mixture are applied to the whole head hair and the like.

5. The applied liquid mixture is re-foamed while the whole head hair ismassaged with fingers for 15 seconds.

6. The hair is left to stand for 10 minutes.

7. The applied liquid mixture is re-foamed while the whole head hair ismassaged with fingers for 25 seconds.

8. After the completion of the re-foaming operation according to theitem 7, the hair is left to stand for 20 minutes.

9. The whole head hair is washed away with hot water, and shampooed,rinsed, and dried in the stated order.

With regard to “foaming property”, “application property”, “foam-holdingproperty”, and “conditioning effect”, evaluations were performed inaccordance with the following criteria, and the results were shown inthe lower columns of blend compositions of Tables 1 to 3.

Foaming Property

-   A: An extremely uniform fine foam.-   B: A uniform fine foam.-   C: A nonuniform coarse foam.-   D: No foam is formed, and water is mixed.

Application property (easiness of application and affinity to hair)

-   A: An agent is firmly fixed to the roots merely by pressing a foam    on the head hair.-   B: An agent can be easily fixed to the roots by running fingers    through the hair.-   C: An agent may not be fixed to some portions such as the roots in    an occipital region of the head where the amount of the hair is    large.-   D: An agent shows a poor affinity, and undyed hair remains in the    roots and the like.

Foam-Holding Property

-   A: A foam shows an extremely long duration and remains until being    left to stand.-   B: A foam has a sufficient duration and remains for a while after    application.-   C: A foam has such a duration that a problem does not occur in    application, but disappears immediately after application.-   D: A foam disappears immediately after discharge, and may cause    liquid dripping during application.

Uneven Dyeing

-   A: No uneven dyeing is observed, and extremely uniform dyeing is    provided.-   B: Almost no uneven dyeing is observed, and uniform dyeing is    provided.-   C: A small degree of uneven dyeing is observed.-   D: A large degree of uneven dyeing is observed.

Conditioning Effect

-   A: The hair after hair dyeing provides no coarse feeling, resulting    in an extremely smooth finish.-   B: The hair after hair dyeing provides almost no coarse feeling,    resulting in a smooth finish.-   C: The hair after hair dyeing provides a small degree of coarse and    rough feeling.-   D: The hair after hair dyeing provides a large degree of coarse and    rough feeling.

TABLE 1 Example Comparative Example (% by mass) 1 2 1 2 3 4 First partp-Aminophenol 0.1 0.1 0.1 0.1 0.1 0.1 p-Amino-o-cresol 0.1 0.1 0.1 0.10.1 0.1 Toluene-2,5-diamine 0.25 0.25 0.25 0.25 0.25 0.25 Resorcin 0.250.25 0.25 0.25 0.25 0.25 Aqueous ammonia (28% by mass) 8.5 8.5 8.5 8.58.5 8.5 Ammonium hydrogen carbonate 8.0 8.0 8.0 8.0 8.0 8.0 Decylglucoside 3.2 3.2 3.2 3.2 3.2 3.2 Laureth-23 2.0 2.0 2.0 2.0 2.0 2.0Propylene glycol 4.0 4.0 4.0 4.0 4.0 4.0 Polyquaternium-7 0.5 — — 0.5 —— Polyquaternium-39 — 0.5 — — 0.5 — Polyquaternium-22 — — 0.5 — — 0.5EDTA-4Na 0.1 0.1 0.1 0.1 0.1 0.1 Ascorbic acid 0.4 0.4 0.4 0.4 0.4 0.4Anhydrous sodium sulfite 0.5 0.5 0.5 0.5 0.5 0.5 Fragrance 0.5 0.5 0.50.5 0.5 0.5 Water Balance Balance Balance Balance Balance Balance Secondpart Aqueous hydrogen peroxide (35% 16.3 16.3 16.3 16.3 16.3 16.3 bymass) Sodium laureth sulfate 1.9 1.9 1.9 1.9 1.9 1.9 Lauric acid 0.040.04 0.04 0.04 0.04 0.04 Cetanol 0.6 0.6 1.5 1.5 1.5 0.6 Etidronic acid0.08 0.08 0.08 0.08 0.08 0.08 Sodium hydroxide * * * * * * Water BalanceBalance Balance Balance Balance Balance Viscosity of liquid mixture 5 540 33 35 7 (first part:second part = 1:1.5) (5° C., mPa · s) EvaluationFoaming property B B D D D C Application B B C C C C propertyFoam-holding B B D D D C property Uneven dyeing A A C C C C ConditioningB B C C C C effect *: Amount for adjusting second part to pH 3.8

TABLE 2 Example (% by mass) 3 4 5 6 7 First part m-Aminophenol 0.15 0.150.15 0.15 0.15 Toluene-2,5-diamine 0.18 0.18 0.18 0.18 0.18 Aqueousammonia (28% by mass) 6.0 6.0 6.0 6.0 6.0 Ammonium hydrogen carbonate10.0 10.0 10.0 10.0 10.0 Decyl glucoside 6.0 6.0 6.0 6.0 6.0 Laureth-232.0 2.0 2.0 2.0 2.0 Propylene glycol 4.0 4.0 4.0 4.0 4.0 Ethanol 7.0 7.07.0 7.0 7.0 Polyquaternium-7 0.5 — 0.5 — 0.5 Polyquaternium-39 — 0.5 —0.5 — Polyquaternium-22 — — 0.4 0.4 0.4 EDTA-4Na 0.1 0.1 0.1 0.1 0.1Ascorbic acid 0.3 0.3 0.3 0.3 0.3 Anhydrous sodium sulfite 0.4 0.4 0.40.4 0.4 Fragrance 0.5 0.5 0.5 0.5 0.5 Water Balance Balance BalanceBalance Balance Second part Aqueous hydrogen peroxide (35% by mass) 16.316.3 16.3 16.3 16.3 Sodium laureth sulfate 0.5 0.5 0.5 0.5 0.7Octoxyglycerin 0.1 0.1 0.1 0.1 0.1 Lauramidopropyl betaine 0.05 0.050.05 0.05 0.02 Lauryl hydroxysultaine 0.05 0.05 0.05 0.05 0.02 Lauricacid 0.01 0.01 0.01 0.04 0.04 Cetanol 0.58 0.58 0.58 0.58 0.58 Stearylalcohol 0.15 0.15 0.15 0.2 0.2 Oxyquinoline sulfate 0.04 0.04 0.04 0.040.04 Etidronic acid 0.08 0.08 0.08 0.08 0.08 Sodium hydroxide * * * * *Water Balance Balance Balance Balance Balance Viscosity of liquidmixture (first 2 2 2 3 3 part:second part = 1:1.5) (5° C., mPa · s)Evaluation Foaming property A A A A A Application property A A A A AFoam-holding property A A A A A Uneven dyeing A A A A A Conditioningeffect B B B B B *: Amount for adjusting second part to pH 3.8

TABLE 3 Example (% by mass) 8 9 10 First part Toluene-2,5-diamine 0.140.14 0.14 p-Phenylenediamine 0.1 0.1 0.1 m-Aminophenol 0.05 0.05 0.05p-Amino-o-cresol 0.1 0.1 0.1 2,4-Diaminophenoxyethanol 0.15 0.15 0.15hydrochloride Aqueous ammonia (28% by mass) 6.0 6.0 6.0 Ammoniumhydrogen carbonate 10.5 10.5 10.5 Decyl glucoside 6.5 6.5 6.5Trideceth-9 0.6 0.6 0.6 Laureth-23 1.8 1.8 1.8 Sodium laureth sulfate2.3 3.3 4.4 Myristyl alcohol 0.2 0.2 0.2 Propylene glycol 4.0 4.0 4.0Ethanol 9.0 9.0 9.0 Polyquaternium-7 0.6 0.6 0.6 Polyquaternium-22 0.40.4 0.4 EDTA-4Na 0.1 0.1 0.1 Ascorbic acid 0.3 0.3 0.3 Anhydrous sodiumsulfite 0.4 0.4 0.4 Fragrance 0.5 0.5 0.5 Water Balance Balance BalanceSecond part (common) Aqueous hydrogen peroxide 16.3 16.3 16.3 (35% bymass) Sodium laureth sulfate 0.4 0.4 0.4 Octoxyglycerin 0.05 0.05 0.05Lauramidopropyl betaine 0.02 0.02 0.02 Lauryl hydroxysultaine 0.02 0.020.02 Lauric acid 0.01 0.01 0.01 Cetanol 0.35 0.35 0.35 Stearyl alcohol0.15 0.15 0.15 Oxyquinoline sulfate 0.04 0.04 0.04 Etidronic acid 0.080.08 0.08 Sodium hydroxide * * * Water Balance Balance Balance Viscosityof liquid mixture 20 20 24 (first part:second part = 1:1.5) (5° C., mPa· s) Evaluation Foaming property A A B Application property A A AFoam-holding property A A A Uneven dyeing A A A Conditioning effect B BB * Amount for adjusting second part to pH 3.8

1. A two-part hair dye composition, comprising a first part comprisingan alkali agent, a second part comprising hydrogen peroxide, and anon-aerosol type foamer container for discharging a liquid mixture ofthe first part and the second part as a foam, wherein the liquid mixturecomprises the following components (A) to (D): (A) 0.1 to 5% by mass ofan alkyl sulfate or a polyoxyalkylene alkyl sulfate; (B) 0.1 to 10% bymass of an alkyl polyglucoside; (C) 0.01 to 3% by mass of adimethyldiallyl ammonium chloride-acrylamide copolymer or adimethyldiallyl ammonium chloride-acrylamide-acrylic acid copolymer; and(D) 0.01 to 0.8% by mass of a higher alcohol.
 2. The two-part hair dyecomposition according to claim 1, wherein a mass ratio of the component(A) to the component (B) (a content of the component (A)/a content ofthe component (B)) in the liquid mixture of the first part and thesecond part is 0.05 to 0.8.
 3. The two-part hair dye compositionaccording to claim 1 or 2, wherein a mass ratio of the component (A) tothe component (C) (a content of the component (A)/a content of thecomponent (C)) in the liquid mixture of the first part and the secondpart is 0.1 to
 10. 4. The two-part hair dye composition according to anyone of claims 1 to 3, further comprising 0.01 to 4% by mass of anonvolatile hydrophilic solvent in the liquid mixture of the first partand the second part.
 5. The two-part hair dye composition according toany one of claims 1 to 4, wherein a content of a silicone in the liquidmixture of the first part and the second part is 0.5% by mass or less.6. A head hair dyeing method, comprising discharging the liquid mixtureof the two-part hair dye composition according to any one of claims 1 to5 as a foam from a non-aerosol type foamer container; applying the foamto a head hair; and then re-foaming on the head hair.